Appeal No. 1996-1992
Application 07/898,373
66. A high-speed machine peelable sausage casing comprising a shirred
elongated cellulosic tube having adjacent first and second longitudinal portions of at least
50 feet in length wherein non-migratory water-insoluble pigment is incorporated in said first
portion of said cellulose casing by dispersion in a wall of said tube to provide it with optical
values which are different from said second portion, and wherein said second portion is
clear and colorless having an opacity of less than 5.0% and a transverse width of at least
3/16 inch, but less than the width of said first portion and said first and second portions
have L, a, b and opacity values meeting at least one of the following conditions:
i) an average opacity value of said first portion that is at least about 0.5 greater
than the average opacity value of said second portion;
ii) a difference in average opacity between said first portion and said second
portion which is less than 10, and a difference between said first and second portions in
their respective average of either said L values or said a values or said b values of at least
about 5; or
iii) a difference of at least about 10 or greater in average opacity between said
first portion and said second portion, and the sum of the absolute values of a and b of the
first portion following extraction of said casing with water and methanol is at least 10.
The references relied upon by the examiner are:
Firth et al. (Firth) 2,857,283 Oct. 21, 1958
Canadian Patent
Grabauskas et al. (Grabauskas) 603,307 Aug. 9, 1960
In addition, the examiner relies upon so-called “Applicant’s disclosed prior art”
identified as appearing at page 8 of the supporting specification.
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